Modular Adhesive Spreading Unit for Viscosity Adaptation
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Solution Overview
Problem
Existing adhesive-spreading units are incompatible with both low-viscosity solvent-based adhesives and high-viscosity solvent-free adhesives, leading to inefficient operation and idle machinery, resulting in significant losses due to limited product range and machine incompatibility.
Innovation Solution
A modular adhesive-spreading unit with interchangeable components, including a tank and a fourth roller, allows quick switching between low- and high-viscosity adhesive configurations, using a first roller with an engraved surface for low-viscosity adhesives and a smooth surface for high-viscosity adhesives, with adjustable roller distances and heating/cooling options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a spreading unit with an engraved first roller and blade chamber is used, then it works effectively with low-viscosity solvent-based adhesives, but it cannot effectively handle high-viscosity solvent-free adhesives due to inefficient scraping and adhesion to micro-cell walls
Solution Approach 1:
The invention makes the first roller surface dynamically changeable by providing both an engraved surface configuration (for low-viscosity adhesives) and a smooth surface configuration (for high-viscosity adhesives). The roller can be replaced or reconfigured depending on the adhesive type being processed, allowing the system to adapt its surface properties to match the viscosity characteristics of different adhesives, thereby resolving the contradiction between versatility and efficient operation.
Solution Approach 2:
The invention changes the physical parameter of the first roller surface (from engraved to smooth) based on the adhesive viscosity requirements. For low-viscosity adhesives, an engraved surface with micro-cells is used to control adhesive pickup. For high-viscosity adhesives, a smooth surface is used to prevent adhesion and ensure efficient transfer, thus resolving the contradiction through parameter adjustment.
2Adaptability or versatility
If a spreading unit with a steel first roller and steel second roller positioned almost in contact is used, then it works effectively with high-viscosity solvent-free adhesives, but it cannot effectively handle low-viscosity solvent-based adhesives due to uncontrolled sliding of material
Solution Approach 1:
The invention makes the first roller surface dynamically changeable by providing both an engraved surface configuration (for low-viscosity adhesives) and a smooth surface configuration (for high-viscosity adhesives). The roller can be replaced or reconfigured depending on the adhesive type being processed, allowing the system to adapt its surface properties to match the viscosity characteristics of different adhesives, thereby resolving the contradiction between versatility and efficient operation.
Solution Approach 2:
The invention changes the physical parameter of the first roller surface (from engraved to smooth) based on the adhesive viscosity requirements. For low-viscosity adhesives, an engraved surface with micro-cells is used to control adhesive pickup. For high-viscosity adhesives, a smooth surface is used to prevent adhesion and ensure efficient transfer, thus resolving the contradiction through parameter adjustment.
3Reliability
If separate spreading machines are equipped for solvent-based and solvent-free adhesives, then each machine can operate efficiently with its designated adhesive type, but significant losses occur due to idle machinery and limited product range
Solution Approach 1:
The invention creates a universal spreading unit that can handle both solvent-based and solvent-free adhesives by incorporating interchangeable first roller surfaces (engraved for low-viscosity, smooth for high-viscosity). This multi-functional design eliminates the need for separate dedicated machines, allowing a single unit to perform efficiently with different adhesive types, thus resolving the contradiction between reliable operation and overall productivity.
Solution Approach 2:
The invention segments the first roller into interchangeable surface configurations that can be independently selected based on adhesive requirements. By dividing the roller system into replaceable components (engraved surface roller for solvent-based adhesives, smooth surface roller for solvent-free adhesives), the system achieves versatility without compromising efficiency, allowing one machine to replace multiple specialized machines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient operation with both low- and high-viscosity adhesives, reducing machine idle time and production limitations, while maintaining reliability and cost-effectiveness by allowing rapid configuration changes and adaptable adhesive handling.
Implementation Method 1
the adhesive is contained in a blade chamber in contact with a first roller, the surface of which is engraved so as to obtain a tight pattern of micro-cells into which a small quantity of adhesive can be deposited
Implementation Method 2
the low viscosity typical of solvent-based adhesives, which enables the doctor blades to precisely scrape the surface of the first roller and enables the micro-cells to transfer almost all their content onto the surface of the rubber-clad roller
Implementation Method 3
The film is advanced in contact with said rubber-clad roller and is held pressed against it so as to transfer a thin layer of adhesive onto its surface
Implementation Method 4
The distances of a few hundredths of a millimeter between the first and the second roller causes a uniform layer of film to be deposited on to the second roller
Implementation Method 5
The distances of a few hundredths of a millimeter between the first and the second roller causes a uniform layer of film to be deposited on to the second roller
Data Source
Figure 1~2b
Figure 2a
Figure 2c
AI summary
The present invention relates to a unit for spreading an adhesive onto a moving film, comprising at least one pair of abutments (1 1) upon which is mounted a first pick-up roller (12) for collecting a quantity of adhesive from a collection zone (13), a second roller (14) that rotates in contact with said first roller (12), intended to receive said quantity of adhesive, and a third roller (15) that rotates in contact with said second roller (14), characterized in that said abutments (11) comprise at least one fixed portion (19) and one moving portion (20, 21) that can be firmly connected to the fixed portion, said moving portion (20, 21) being configured: to house a tank (17) in which said adhesive collection zone (13) is found, or to house an additional fourth roller (18) positioned at a given distance from said first roller (12), said collection zone (13) being located in the upper space between said first and said fourth roller (12, 18).